STATE / TERRITORY LEDGER
Ohio drinking water system records
EPA’s September 2026 export lists 369 active community water systems in Ohio, with 240 current-violation flags and 12 serious-violator flags among covered systems serving at least 2,500 people.
Source: EPA SDWIS system-search export · Active community systems · Snapshot 13 Sep 2026
Systems369active CWS · pop. 2,500+
Population served9,969,200reported total; may overlap
Current violation flag65.0%240 systems
Serious-violator flag3.3%12 systems
01 / LARGEST SYSTEMS
Ohio community water systems
EPA’s covered Ohio records include 369 active community systems reporting a combined population-served total of 9,969,200, which may overlap.
Population served is a system-reported service figure. It is not a count of unique state residents.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Cleveland Public Water SystemOH1801212 | 1,308,955 | Surface water | No current violation flagged |
| Columbus Public Water SystemOH2504412 | 1,305,946 | Surface water | No current violation flagged |
| Cincinnati Public Water SystemOH3102612 | 750,200 | Surface water | No current violation flagged |
| Toledo City OfOH4801411 | 360,000 | Surface water | No current violation flagged |
| Akron City PWSOH7700011 | 280,000 | Surface water | No current violation flagged |
| Montgomery County Water Services 1 PWSOH5701315 | 150,207 | Surface water purchased | No current violation flagged |
| Del-Co Water Company, Inc.OH2101412 | 150,000 | Surface water | No current violation flagged |
| Dayton Public Water SystemOH5703512 | 141,407 | Surface water | No current violation flagged |
| Clermont Public Water SystemOH1302212 | 133,059 | Surface water | Other current violation flag |
| Youngstown City PWSOH5002303 | 130,530 | Surface water purchased | No current violation flagged |
| Butler Co. Water District 2 PWSOH0900303 | 116,572 | Surface water purchased | No current violation flagged |
| Canton Public Water SystemOH7608112 | 107,113 | Ground water | Other current violation flag |
| Aqua Ohio - Massillon PWSOH7604512 | 95,636 | Ground water | Other current violation flag |
| Montgomery County Water Services 2 PWSOH5701503 | 83,033 | Surface water purchased | No current violation flagged |
| Warren CountyOH8301512 | 81,975 | Ground water | Other current violation flag |
| Lake County West Water SubdistrictOH4302411 | 78,379 | Surface water | No current violation flagged |
| Aqua Ohio - MentorOH4301511 | 74,500 | Surface water | No current violation flagged |
| Rural Lorain Co. Water AOH4701803 | 73,125 | Surface water purchased | No current violation flagged |
| Elyria Water DepartmentOH4700411 | 68,000 | Surface water | No current violation flagged |
| Lima CityOH0200811 | 65,619 | Surface water | No current violation flagged |
| Lorain City PWSOH4700711 | 64,152 | Surface water | Current monitoring/reporting flag |
| Hamilton Public Water SystemOH0904012 | 62,447 | Ground water | Other current violation flag |
| Springfield City PWSOH1204412 | 60,680 | Ground water | Other current violation flag |
| Aqua Ohio - StruthersOH5001611 | 58,551 | Surface water | Other current violation flag |
| Findlay City PWSOH3200111 | 54,040 | Surface water | Other current violation flag |
| Middletown City PWSOH0901712 | 51,229 | Ground water | Other current violation flag |
| Cuyahoga Falls City PWSOH7701012 | 51,114 | Ground water | Other current violation flag |
| Mansfield CityOH7002914 | 51,000 | Surface water | Other current violation flag |
| Lakewood City PWSOH1801003 | 50,942 | Surface water purchased | No current violation flagged |
| Newark City PWSOH4502314 | 49,934 | Surface water | Other current violation flag |
| Warren City PWSOH7803811 | 49,130 | Surface water | No current violation flagged |
| Aqua Ohio - MarionOH5100414 | 47,102 | Surface water | No current violation flagged |
| Medina Co/Northwest PWSOH5201903 | 46,324 | Surface water purchased | Other current violation flag |
| Fairfield City PWSOH0900715 | 44,907 | Ground water | No current violation flagged |
| Delaware City PWSOH2100311 | 43,895 | Surface water | No current violation flagged |
| Huber Heights Public Water SystemOH5703612 | 43,439 | Ground water | Other current violation flag |
| Southwest Regional Water DistrictOH0903912 | 42,856 | Ground water | No current violation flagged |
| Greene Co.-Northwest Reg WaterOH2903512 | 41,895 | Ground water | Other current violation flag |
| Lake County East Water SubdistrictOH4302911 | 40,656 | Surface water | No current violation flagged |
| Portsmouth CityOH7300111 | 40,475 | Surface water | Other current violation flag |
| Lancaster City PWSOH2301012 | 40,400 | Ground water | Other current violation flag |
| Western Water CompanyOH8300512 | 39,508 | Surface water purchased | Other current violation flag |
| Westerville City PWSOH2503411 | 39,000 | Surface water | No current violation flagged |
| Reynoldsburg City PWSOH2503203 | 37,847 | Surface water purchased | Other current violation flag |
| Stow Public Water SystemOH7704503 | 35,437 | Surface water purchased | Other current violation flag |
| Ross County Water Co IncOH7101412 | 35,345 | Ground water | No current violation flagged |
| Hecla Water AssociationOH4401612 | 34,942 | Surface water purchased | No current violation flagged |
| Fairborn Public Water SystemOH2900612 | 34,620 | Ground water | Other current violation flag |
| Gahanna City PWSOH2501303 | 33,258 | Surface water purchased | No current violation flagged |
| Athens PWSOH0500212 | 32,725 | Ground water | Other current violation flag |
| Aqua Ohio - AshtabulaOH0400711 | 32,342 | Surface water | Other current violation flag |
| Brown County Rural WaterOH0802012 | 32,090 | Ground water | No current violation flagged |
| Painesville City PWSOH4301611 | 31,728 | Surface water | Other current violation flag |
| Bowling Green CityOH8700311 | 31,578 | Surface water | No current violation flagged |
| Barberton CityOH7700411 | 31,298 | Surface water | No current violation flagged |
| NawaOH5553612 | 29,974 | Ground water | Other current violation flag |
| Kent City PWSOH6701812 | 29,662 | Ground water | No current violation flagged |
| North Ridgeville City PWSOH4700803 | 29,465 | Surface water purchased | Current monitoring/reporting flag |
| Zanesville PWSOH6002712 | 29,381 | Ground water | No current violation flagged |
| Xenia City PWSOH2902812 | 29,000 | Ground water | Current monitoring/reporting flag |
| Highland County Water Company, Inc.OH3600514 | 28,421 | Ground water | No current violation flagged |
| Perrysburg City PWSOH8701803 | 27,000 | Surface water purchased | No current violation flagged |
| Belmont Co. Sanitary District 3 PWSOH0700412 | 26,822 | Ground water | Other current violation flag |
| Wooster City PWSOH8504512 | 26,618 | Ground water | Other current violation flag |
| Troy City PWSOH5501612 | 26,305 | Ground water | No current violation flagged |
| Medina City PWSOH5200514 | 25,956 | Surface water purchased | No current violation flagged |
| Sandusky CityOH2201411 | 25,793 | Surface water | No current violation flagged |
| Marysville City PWSOH8000314 | 25,571 | Surface water | Other current violation flag |
| North Canton City PWSOH7604312 | 24,747 | Ground water | No current violation flagged |
| Wadsworth City PWSOH5201712 | 24,356 | Ground water | Other current violation flag |
| Tate-Monroe Water Association PWSOH1301312 | 24,092 | Ground water | Other current violation flag |
| Oxford City PWSOH0902312 | 24,000 | Ground water | No current violation flagged |
| Avon City PWSOH4700203 | 23,800 | Surface water purchased | Other current violation flag |
| Avon Lake City PWSOH4700311 | 23,659 | Surface water | No current violation flagged |
| Alliance City PWSOH7600011 | 22,232 | Surface water | No current violation flagged |
| Niles City PWSOH7802403 | 21,961 | Surface water purchased | Other current violation flag |
| Adams County Regional Wd PWSOH0100012 | 21,810 | Ground water | No current violation flagged |
| Chillicothe City PWSOH7100112 | 21,725 | Ground water | Current monitoring/reporting flag |
| Sylvania CityOH4801303 | 21,618 | Surface water purchased | Current monitoring/reporting flag |
| Muskingum County Water - SeOH6000412 | 21,540 | Ground water | No current violation flagged |
| Gallia Co Rural Water AssociationOH2700012 | 20,995 | Ground water | Other current violation flag |
| Lebanon CityOH8304112 | 20,700 | Surface water purchased | No current violation flagged |
| Ashland CityOH0300112 | 20,648 | Ground water | Other current violation flag |
| Sidney City PWSOH7501214 | 20,614 | Surface water | Other current violation flag |
| Ottawa County Regional Water DistrictOH6205011 | 20,428 | Surface water | No current violation flagged |
| Piqua City PWSOH5501211 | 20,354 | Surface water | Other current violation flag |
| Aqua Ohio - TiffinOH7400614 | 20,279 | Surface water | Other current violation flag |
| Oregon CityOH4800911 | 19,950 | Surface water | No current violation flagged |
| Norwood City PWSOH3101703 | 19,870 | Surface water purchased | Other current violation flag |
| Miamisburg City PWSOH5701212 | 19,790 | Ground water | Other current violation flag |
| Northwestern W And Sd - Toledo Svc AreaOH8752812 | 19,758 | Surface water purchased | Other current violation flag |
| Le-Ax Regional Water District PWSOH0501111 | 19,311 | Ground water | Other current violation flag |
| Springboro PWSOH8301412 | 19,263 | Ground water | No current violation flagged |
| Pickerington City PWSOH2301512 | 19,141 | Ground water | Other current violation flag |
| Berea City PWSOH1800111 | 18,789 | Surface water | Other current violation flag |
| Marietta City PWSOH8400412 | 18,707 | Ground water | Other current violation flag |
| Tallmadge City PWSOH7704703 | 18,394 | Surface water purchased | Other current violation flag |
| Fremont CityOH7200311 | 18,319 | Surface water | Other current violation flag |
| Northern Ohio Rural WaterOH3902403 | 18,224 | Surface water purchased | Other current violation flag |
| Licking Regional Water DistrictOH4505412 | 17,818 | Ground water | No current violation flagged |
| Norwalk City PWSOH3901111 | 17,466 | Surface water | No current violation flagged |
| New Philadelphia City PWSOH7900812 | 17,410 | Ground water | Other current violation flag |
| Erie Co Perkins DistrictOH2200603 | 17,241 | Surface water purchased | Other current violation flag |
| Steubenville, City OfOH4102411 | 17,000 | Surface water | Current health-based flag |
| Mount Vernon City PWSOH4200812 | 16,990 | Ground water | Other current violation flag |
| Salem CityOH1502011 | 16,850 | Surface water | Other current violation flag |
| Wright-Patterson Afb Area A PWSOH2903412 | 16,551 | Ground water | No current violation flagged |
| Defiance CityOH2000111 | 16,494 | Surface water | Other current violation flag |
| Tuppers Plains/Chester Water DistrictOH5300612 | 16,087 | Ground water | Other current violation flag |
| Ravenna City PWSOH6703211 | 16,000 | Surface water | No current violation flagged |
| Jackson Co. Water Company-WtpOH4002012 | 15,984 | Ground water | Other current violation flag |
| Aurora City - Cleveland PWSOH6789112 | 15,852 | Surface water purchased | No current violation flagged |
| Monroe City PWSOH0902012 | 15,600 | Surface water purchased | Other current violation flag |
| Pike Water, Inc.-Plant PWSOH6602412 | 15,487 | Ground water | Other current violation flag |
| Fairfield County Utilities PWSOH2301912 | 15,486 | Ground water | No current violation flagged |
| Streetsboro City PWSOH6705003 | 15,105 | Ground water purchased | No current violation flagged |
| Indian Hill City PWSOH3101112 | 15,000 | Ground water | No current violation flagged |
| Ashtabula County Water SystemOH0400803 | 14,757 | Surface water purchased | Current monitoring/reporting flag |
| Maumee CityOH4800603 | 14,286 | Surface water purchased | No current violation flagged |
| Bexley City PWSOH2500103 | 14,250 | Surface water purchased | Other current violation flag |
| Girard CityOH7801103 | 14,122 | Surface water purchased | Other current violation flag |
| Washington Court House PWSOH2400714 | 14,100 | Surface water | Other current violation flag |
| Jefferson Co W And S District - MOH4101103 | 13,983 | Surface water purchased | Other current violation flag |
| Circleville City PWSOH6500412 | 13,927 | Ground water | No current violation flagged |
| Scioto Co. Regional Water District #1OH7300212 | 13,820 | Ground water | No current violation flagged |
| Coshocton PWSOH1600012 | 13,537 | Ground water | Other current violation flag |
| Englewood City PWSOH5700812 | 13,463 | Ground water | No current violation flagged |
| Fostoria CityOH7400411 | 13,441 | Surface water | No current violation flagged |
| Dover City PWSOH7900412 | 13,253 | Ground water | Other current violation flag |
| Bellefontaine City PWSOH4600112 | 13,249 | Ground water | Current serious-violator flag |
| Greenville City PWSOH1900714 | 13,227 | Surface water | Other current violation flag |
| Warren Co. Socialville PWSOH8304203 | 13,216 | Surface water purchased | Other current violation flag |
| Bedford City PWSOH1800003 | 13,149 | Surface water purchased | No current violation flagged |
| Trenton City PWSOH0903012 | 13,012 | Ground water | Other current violation flag |
| Loveland City PWSOH1300812 | 12,800 | Ground water | Other current violation flag |
| East Liverpool CityOH1500811 | 12,586 | Surface water | No current violation flagged |
| Bucyrus CityOH1700011 | 12,570 | Surface water | No current violation flagged |
| ConneautOH0400411 | 12,538 | Surface water | No current violation flagged |
| Wilmington City PWSOH1401211 | 12,401 | Surface water | No current violation flagged |
| Amherst City PWSOH4700003 | 11,797 | Surface water purchased | Other current violation flag |
| Franklin Public Water SystemOH8300412 | 11,690 | Ground water | No current violation flagged |
| Celina, City OfOH5400011 | 11,682 | Surface water | Other current violation flag |
| Harrison City PWSOH3100812 | 11,600 | Ground water | Other current violation flag |
| Urbana City PWSOH1101212 | 11,428 | Ground water | No current violation flagged |
| Jefferson Water And Sewer District PWSOH2504012 | 11,294 | Ground water | Other current violation flag |
| IrontonOH4400711 | 11,129 | Surface water | Current serious-violator flag |
| Northwest Regional Water DistrictOH7300003 | 11,059 | Ground water purchased | No current violation flagged |
| Wright-Patterson Afb Area B PWSOH2903312 | 11,034 | Ground water | No current violation flagged |
| Wapakoneta City PWSOH0600712 | 11,000 | Ground water | Other current violation flag |
| Van Wert CityOH8100611 | 10,846 | Surface water | No current violation flagged |
| Vermilion CityOH2201511 | 10,594 | Surface water | Other current violation flag |
| Cambridge, City OfOH3000111 | 10,520 | Surface water | Other current violation flag |
| Galion CityOH1700211 | 10,453 | Surface water | Other current violation flag |
| City Of Heath PWSOH4500912 | 10,310 | Ground water | Other current violation flag |
| Buckeye Water District - Ohio RiverOH1502911 | 10,300 | Surface water | Other current violation flag |
| Mid-Ohio Wsd - Chrisman Avenue WtpOH4900712 | 10,256 | Ground water | Other current violation flag |
| Earnhart Hill Water District PWSOH6500812 | 10,057 | Ground water | Other current violation flag |
| Trumbull Co. - Southeast PWSOH7803203 | 9,931 | Surface water purchased | Other current violation flag |
| Pataskala CityOH4502512 | 9,900 | Ground water | No current violation flagged |
| Little Hocking Water Association, Inc.OH8400212 | 9,892 | Ground water | No current violation flagged |
| Wyoming City PWSOH3102212 | 9,700 | Ground water | No current violation flagged |
| Jackson, City OfOH4000111 | 9,691 | Surface water | Other current violation flag |
| Northwestern W And Sd - Oregon Wtln 200OH8704203 | 9,629 | Surface water purchased | No current violation flagged |
| Oakwood City PWSOH5701915 | 9,572 | Ground water | No current violation flagged |
| Reading City PWSOH3101812 | 9,506 | Surface water purchased | Current serious-violator flag |
| Bellbrook Water WorksOH2901112 | 9,475 | Ground water | Other current violation flag |
| Shelby CityOH7004511 | 9,453 | Surface water | Other current violation flag |
| St Marys CityOH0600612 | 9,356 | Ground water | Other current violation flag |
| Canal Winchester City PWSOH2500312 | 9,286 | Ground water | Other current violation flag |
| Twin City Water And Sewer District PWSOH7901711 | 9,224 | Ground water | Other current violation flag |
| Louisville City PWSOH7603012 | 9,186 | Ground water | Other current violation flag |
| Sheffield Lake City PWSOH4701103 | 9,108 | Surface water purchased | No current violation flagged |
| Chillicothe Correctional InstitutionOH7101212 | 9,000 | Ground water | Other current violation flag |
| Trotwood City PWSOH5702403 | 9,000 | Surface water purchased | Other current violation flag |
| Wright State UniversityOH2902012 | 8,948 | Ground water | Other current violation flag |
| Guernsey Co. Water Dept.OH3000603 | 8,891 | Surface water purchased | Other current violation flag |
| Clark County Northridge PWSOH1201003 | 8,874 | Ground water purchased | No current violation flagged |
| Scioto Water Inc.-Rose HillOH7300303 | 8,861 | Ground water | Other current violation flag |
| Napoleon CityOH3500811 | 8,858 | Surface water | No current violation flagged |
| Bryan City PWSOH8600012 | 8,729 | Ground water | Other current violation flag |
| Portage County Water ResourcesOH6702812 | 8,606 | Ground water | Current serious-violator flag |
| Oberlin Water DepartmentOH4700911 | 8,600 | Surface water | Other current violation flag |
| Sanitary District #4OH2501003 | 8,575 | Surface water purchased | Current monitoring/reporting flag |
| Hubbard City PWSOH7801415 | 8,518 | Surface water purchased | Other current violation flag |
| Orrville City PWSOH8502712 | 8,452 | Ground water | No current violation flagged |
| Eaton Public Water SystemOH6801612 | 8,400 | Ground water | No current violation flagged |
| Hudson City PWSOH7701612 | 8,385 | Ground water | Other current violation flag |
| West Carrollton City PWSOH5702812 | 8,361 | Ground water | No current violation flagged |
| Kenton CityOH3300612 | 8,360 | Ground water | Current monitoring/reporting flag |
| Trumbull Co. - Bazetta/ChampionOH7804303 | 8,270 | Surface water purchased | Other current violation flag |
| Bellevue CityOH3900011 | 8,236 | Surface water | Other current violation flag |
| Aqua Ohio - Lawrence CountyOH4400803 | 8,130 | Surface water purchased | No current violation flagged |
| Knox County Water And Wastewater PWSOH4202012 | 7,710 | Ground water | Other current violation flag |
| Canfield City PWSOH5000503 | 7,706 | Surface water purchased | Other current violation flag |
| Rattlesnake PWSOH2437412 | 7,685 | Surface water | Other current violation flag |
| Wauseon City PWSOH2600111 | 7,568 | Surface water | Other current violation flag |
| Warren Comm W And S Assn 2OH8402703 | 7,215 | Ground water | Other current violation flag |
| Gallipolis PWSOH2700112 | 7,134 | Ground water | Other current violation flag |
| Cortland City PWSOH7800512 | 7,105 | Ground water | Other current violation flag |
| Delphos CityOH0200412 | 7,101 | Surface water | No current violation flagged |
| Aqua Ohio - BlacklickOH2502412 | 7,100 | Ground water | No current violation flagged |
| Willard CityOH3901511 | 7,099 | Surface water | No current violation flagged |
| Union City PWSOH5702512 | 7,000 | Ground water | Other current violation flag |
| Martins Ferry Public Water SystemOH0701212 | 6,980 | Ground water | Other current violation flag |
| Huron CityOH2201011 | 6,893 | Surface water | No current violation flagged |
| Ontario CityOH7003512 | 6,756 | Ground water | Other current violation flag |
| Columbiana City PWSOH1500312 | 6,727 | Ground water | Other current violation flag |
| Logan, City OfOH3700612 | 6,704 | Ground water | Current monitoring/reporting flag |
| Milford City PWSOH1301012 | 6,700 | Ground water | Other current violation flag |
| Upper Sandusky CityOH8800511 | 6,698 | Surface water | Other current violation flag |
| Stark County Water DistrictOH7607303 | 6,690 | Ground water purchased | No current violation flagged |
| Leading Creek Conservancy DistrictOH5300012 | 6,663 | Ground water | Other current violation flag |
| Nelsonville PWSOH0501214 | 6,656 | Ground water | Current monitoring/reporting flag |
| Hillsboro CityOH3600614 | 6,650 | Surface water | Other current violation flag |
| Mount Orab Village PWSOH0801011 | 6,607 | Surface water | Other current violation flag |
| Tcmsd-Wilkshire Hills PWSOH7901612 | 6,587 | Ground water | No current violation flagged |
| Maysville Regional WaterOH6001411 | 6,540 | Ground water purchased | Current serious-violator flag |
| BarnesvilleOH0700011 | 6,500 | Surface water | Other current violation flag |
| Port Clinton CityOH6203211 | 6,500 | Surface water purchased | Other current violation flag |
| Waterville CityOH4801503 | 6,500 | Surface water purchased | Other current violation flag |
| Rittman City PWSOH8503012 | 6,491 | Ground water | Other current violation flag |
| Scioto Water Inc.-Sugar CampOH7300903 | 6,458 | Ground water | Other current violation flag |
| Belpre City PWSOH8400012 | 6,441 | Ground water | Other current violation flag |
| Northern Ohio Rural Water - Nw DistrictOH2201803 | 6,409 | Surface water purchased | No current violation flagged |
| Trumbull Co. - Howland Twp PWSOH7806303 | 6,396 | Surface water purchased | Other current violation flag |
| Clyde CityOH7200211 | 6,325 | Surface water | Other current violation flag |
| Newton Falls CityOH7802311 | 6,109 | Surface water | No current violation flagged |
| Sebring Village PWSOH5001911 | 6,058 | Surface water | Other current violation flag |
| Andover-Camplands WaterOH0400212 | 6,009 | Ground water | No current violation flagged |
| Cleves Village PWSOH3100512 | 6,000 | Ground water | Current monitoring/reporting flag |
| Granville, Village OfOH4500612 | 5,946 | Ground water | Other current violation flag |
| Geneva City PWSOH0401712 | 5,924 | Surface water purchased | Other current violation flag |
| Brookville Municipality PWSOH5700203 | 5,923 | Surface water purchased | Other current violation flag |
| Wellston City PWSOH4001912 | 5,846 | Surface water | Other current violation flag |
| New Carlisle City PWSOH1203312 | 5,800 | Ground water | Other current violation flag |
| Toronto PWSOH4102811 | 5,676 | Surface water | No current violation flagged |
| Archbold VillageOH2600011 | 5,586 | Surface water | No current violation flagged |
| Germantown City PWSOH5701012 | 5,547 | Ground water | Other current violation flag |
| Sunday Creek Valley Water PWSOH0501503 | 5,451 | Ground water purchased | Other current violation flag |
| Aqua Ohio - Huber Ridge PWSOH2502512 | 5,393 | Ground water | No current violation flagged |
| Ada VillageOH3300012 | 5,334 | Ground water | Other current violation flag |
| Canal Fulton City PWSOH7600912 | 5,323 | Ground water | Other current violation flag |
| Chardon City PWSOH2800412 | 5,247 | Ground water | No current violation flagged |
| Northern Ohio Rural Water-South DistrictOH3946712 | 5,226 | Surface water purchased | Other current violation flag |
| Johnstown City PWSOH4501512 | 5,200 | Ground water | Other current violation flag |
| Whitehouse VillageOH4801612 | 5,200 | Surface water purchased | Other current violation flag |
| Mid-Ohio Wsd - Old Springfield Road WtpOH4901012 | 5,176 | Ground water | Other current violation flag |
| New LexingtonOH6400411 | 5,161 | Surface water | Other current violation flag |
| Erie Co Margaretta DistrictOH2200203 | 5,131 | Surface water purchased | Other current violation flag |
| ByesvilleOH3001212 | 5,104 | Groundwater under influence of surface water | Current monitoring/reporting flag |
| St. Clairsville, City Of PWSOH0701516 | 5,097 | Surface water | Current serious-violator flag |
| Munroe Falls City PWSOH7702703 | 5,042 | Ground water purchased | No current violation flagged |
| Put-In-Bay VillageOH6203311 | 5,000 | Surface water | Other current violation flag |
| Chagrin Falls Village PWSOH1800212 | 4,991 | Surface water purchased | Other current violation flag |
| West Milton Village PWSOH5501711 | 4,890 | Ground water purchased | Other current violation flag |
| Lexington VillageOH7002212 | 4,825 | Ground water | Other current violation flag |
| Jefferson Regional Water AuthorityOH5703012 | 4,813 | Ground water | Other current violation flag |
| Wellington Village PWSOH4701511 | 4,802 | Surface water | Other current violation flag |
| Greene County Eastern Regional PWSOH2906103 | 4,800 | Ground water purchased | Other current violation flag |
| Northwestern W And Sd - PortageOH8704103 | 4,776 | Surface water purchased | No current violation flagged |
| Coldwater VillageOH5400112 | 4,774 | Ground water | No current violation flagged |
| East Palestine Village PWSOH1500912 | 4,761 | Ground water | Other current violation flag |
| Medina Co/Southern Water Dist PWSOH5260712 | 4,708 | Ground water | Other current violation flag |
| Greenfield Village PWSOH3600312 | 4,600 | Ground water | No current violation flagged |
| Ashville Village PWSOH6500012 | 4,529 | Ground water | Other current violation flag |
| Crestline Village PWSOH1700112 | 4,525 | Ground water | Other current violation flag |
| West Jefferson Village PWSOH4902012 | 4,488 | Ground water | Other current violation flag |
| Mid-Ohio Wsd - Jackson Street WtpOH4901112 | 4,467 | Ground water | Other current violation flag |
| Waverly City PWSOH6600912 | 4,433 | Ground water | Other current violation flag |
| Oak Harbor VillageOH6202603 | 4,400 | Surface water purchased | Other current violation flag |
| Ottawa VillageOH6900711 | 4,393 | Surface water | Current serious-violator flag |
| Monroe Water SystemsOH5600812 | 4,334 | Ground water | Other current violation flag |
| Georgetown Village PWSOH0800503 | 4,331 | Ground water purchased | Other current violation flag |
| Montpelier VillageOH8600912 | 4,280 | Ground water | Other current violation flag |
| Bellaire Public Water SystemOH0700114 | 4,278 | Surface water | Current monitoring/reporting flag |
| Blanchester Village PWSOH1400111 | 4,243 | Surface water | No current violation flagged |
| Mcdonald Village PWSOH7802003 | 4,236 | Surface water purchased | Other current violation flag |
| Clark County Park Layne PWSOH1201112 | 4,221 | Ground water | No current violation flagged |
| Sheffield Village PWSOH4701203 | 4,165 | Surface water purchased | No current violation flagged |
| South Point VillageOH4401212 | 4,133 | Ground water | Other current violation flag |
| Bluffton VillageOH0200112 | 4,125 | Surface water purchased | Other current violation flag |
| Elida VillageOH0200503 | 4,109 | Surface water purchased | No current violation flagged |
| Waynesville Village PWSOH8302012 | 4,100 | Ground water | No current violation flagged |
| Southern Perry Co-CongoOH6401603 | 4,029 | Ground water purchased | Other current violation flag |
| Aqua Ohio - MasuryOH7802711 | 4,019 | Surface water purchased | Other current violation flag |
| Cedarville UniversityOH2903612 | 4,000 | Ground water | Other current violation flag |
| Wintersville Village PWSOH4103003 | 3,924 | Surface water purchased | Other current violation flag |
| South Lebanon City PWSOH8301312 | 3,891 | Surface water purchased | No current violation flagged |
| Newcomerstown Village PWSOH7900912 | 3,882 | Ground water | Current monitoring/reporting flag |
| Swanton VillageOH2601011 | 3,855 | Surface water | No current violation flagged |
| New Lebanon Village PWSOH5701812 | 3,770 | Ground water | Other current violation flag |
| Yellow Springs Village PWSOH2903012 | 3,761 | Ground water | Other current violation flag |
| Miami Co-Camp Troy PWSOH5502503 | 3,742 | Ground water purchased | No current violation flagged |
| Jackson/Milton Metro Water District PWSOH5054212 | 3,728 | Surface water purchased | Current monitoring/reporting flag |
| Shadyside Public Water SystemOH0701612 | 3,689 | Ground water | Other current violation flag |
| Minerva Village PWSOH7603812 | 3,684 | Ground water | Other current violation flag |
| Carey Village PWSOH8800012 | 3,674 | Ground water | Current monitoring/reporting flag |
| Northwestern W And Sd - WestonOH8703211 | 3,648 | Surface water purchased | No current violation flagged |
| Northwestern W And Sd - Middleton TwpOH8752212 | 3,615 | Surface water purchased | No current violation flagged |
| Paulding Village PWSOH6300411 | 3,605 | Surface water | Other current violation flag |
| Hicksville VillageOH2000212 | 3,600 | Ground water | Current serious-violator flag |
| Aqua Ohio - Lake DarbyOH2502612 | 3,562 | Ground water | No current violation flagged |
| Delta VillageOH2600311 | 3,518 | Surface water | Other current violation flag |
| Lordstown Village PWSOH7804403 | 3,515 | Surface water purchased | Other current violation flag |
| Mt Gilead Village PWSOH5900712 | 3,503 | Ground water | Other current violation flag |
| Commercial Point VillageOH6503512 | 3,497 | Ground water | Other current violation flag |
| Lockland Village PWSOH3101212 | 3,486 | Ground water | No current violation flagged |
| North Baltimore VillageOH8701611 | 3,432 | Surface water | Other current violation flag |
| Licking County Harbor Hills PWSOH4500812 | 3,415 | Ground water purchased | Other current violation flag |
| Lebanon Correctional InstitutionOH8301012 | 3,410 | Ground water | Other current violation flag |
| Odrc-Pickaway Correction PWSOH6501712 | 3,376 | Ground water | Current monitoring/reporting flag |
| Morrow Village PWSOH8300912 | 3,360 | Ground water | Current serious-violator flag |
| Cadiz Village PWSOH3400214 | 3,353 | Surface water | Current serious-violator flag |
| Mingo Junction PWSOH4101612 | 3,350 | Ground water | Other current violation flag |
| Caldwell Village PWSOH6100011 | 3,300 | Surface water | Other current violation flag |
| Athens Co., The Plains S.D. 1 PWSOH0500303 | 3,276 | Ground water purchased | Other current violation flag |
| Groveport PWSOH2501512 | 3,229 | Ground water | No current violation flagged |
| Aqua Ohio - Village Of JeffersonOH0401812 | 3,226 | Surface water purchased | No current violation flagged |
| New London Village PWSOH3902611 | 3,226 | Surface water | No current violation flagged |
| Western Guernsey Regional Water DistrictOH3001103 | 3,225 | Surface water purchased | Other current violation flag |
| Millersport Village PWSOH2301212 | 3,200 | Ground water | Other current violation flag |
| New Miami Village PWSOH0902112 | 3,200 | Ground water | No current violation flagged |
| Fairport Harbor Village PWSOH4300411 | 3,180 | Surface water purchased | No current violation flagged |
| West Union Public Water SystemOH0100503 | 3,170 | Ground water purchased | No current violation flagged |
| Obetz Village PWSOH2502212 | 3,167 | Ground water | Other current violation flag |
| Millersburg Village PWSOH3800912 | 3,151 | Ground water | Other current violation flag |
| Kelleys Island VillageOH2201111 | 3,125 | Surface water | No current violation flagged |
| Genoa VillageOH6201003 | 3,110 | Surface water purchased | Other current violation flag |
| Lakemore Village PWSOH7701812 | 3,068 | Ground water | Other current violation flag |
| Oak Hill, Village OfOH4000411 | 3,067 | Ground water purchased | Other current violation flag |
| Carrollton VillageOH1000012 | 3,055 | Ground water | Current serious-violator flag |
| Doylestown Village PWSOH8500612 | 3,051 | Ground water | Other current violation flag |
| New Bremen VillageOH0600512 | 3,034 | Ground water | Other current violation flag |
| Minster VillageOH0600412 | 3,025 | Ground water | No current violation flagged |
| Highland Ridge W And S Association IncOH8403203 | 3,022 | Ground water purchased | Other current violation flag |
| Clark County Green Meadows 2 PWSOH1200703 | 3,008 | Ground water purchased | Other current violation flag |
| Geauga County-BainbridgeOH2804003 | 3,000 | Surface water purchased | Other current violation flag |
| Tri-County Rural W And S DistrictOH8403112 | 3,000 | Ground water | No current violation flagged |
| Baltimore Village PWSOH2300112 | 2,995 | Ground water | Other current violation flag |
| Lakengren Water AuthorityOH6800712 | 2,950 | Ground water | No current violation flagged |
| Old Straitsville Water AssociationOH6401403 | 2,950 | Ground water purchased | Other current violation flag |
| Lodi Village PWSOH5200412 | 2,884 | Ground water | Other current violation flag |
| Trumbull Co. - Mineral Ridge PWSOH7803503 | 2,858 | Surface water purchased | Other current violation flag |
| Bridgeport Public Water SystemOH0700612 | 2,830 | Ground water purchased | Current serious-violator flag |
| Lisbon VillageOH1501512 | 2,821 | Ground water | Other current violation flag |
| South Zanesville PWSOH6002212 | 2,800 | Ground water | No current violation flagged |
| Grafton Village PWSOH4700511 | 2,769 | Surface water purchased | Other current violation flag |
| Middlefield Village PWSOH2802012 | 2,748 | Ground water | No current violation flagged |
| Buckeye Lake, Village Of PWSOH4564712 | 2,746 | Ground water purchased | Other current violation flag |
| Putnam Community Water Association PWSOH8400712 | 2,744 | Ground water | Other current violation flag |
| Covington Village PWSOH5500112 | 2,718 | Ground water | No current violation flagged |
| Columbia Park Water SystemOH1841012 | 2,716 | Surface water purchased | Other current violation flag |
| New Richmond Village PWSOH1301212 | 2,698 | Ground water | Other current violation flag |
| Versailles Village PWSOH1901312 | 2,687 | Ground water | No current violation flagged |
| Clear Water CorporationOH6100103 | 2,670 | Surface water purchased | Current monitoring/reporting flag |
| Fredericktown VillageOH4200212 | 2,648 | Ground water | No current violation flagged |
| Loudonville VillageOH0301012 | 2,641 | Ground water | No current violation flagged |
| Jefferson Co W And S District- AOH4100803 | 2,635 | Ground water purchased | Other current violation flag |
| Bethel Village PWSOH1300116 | 2,620 | Ground water purchased | Other current violation flag |
| Strasburg Village PWSOH7901212 | 2,610 | Ground water | Other current violation flag |
| Woodsfield Village PWSOH5600711 | 2,598 | Surface water | Current monitoring/reporting flag |
| St Henry VillageOH5401312 | 2,596 | Ground water | Other current violation flag |
| Sabina Village PWSOH1400912 | 2,564 | Ground water | Current monitoring/reporting flag |
| CrooksvilleOH6400111 | 2,534 | Ground water purchased | Other current violation flag |
| Silver Lake Village PWSOH7704303 | 2,519 | Ground water purchased | No current violation flagged |
| Gibsonburg Village PWSOH7200412 | 2,506 | Ground water | Other current violation flag |
| Aqua Ohio - Worthington Hills PWSOH2502812 | 2,500 | Ground water | No current violation flagged |
| Glendale Village PWSOH3100712 | 2,500 | Ground water | Other current violation flag |
| Switzerland Of Ohio WaterOH5600503 | 2,500 | Surface water purchased | Other current violation flag |
02 / CITY REPORTS
Ohio city water-system reports
Ohio has 0 city reports meeting the publication threshold for covered systems or reported population served.
No qualifying city reports.
03 / COUNTY REPORTS
Ohio county water-system reports
Ohio has 78 county reports meeting the publication threshold for covered systems or reported population served.
Franklin14 systemsMontgomery14 systemsTrumbull13 systemsLorain12 systemsGreene10 systemsWarren10 systemsButler9 systemsHamilton9 systemsSummit9 systemsLicking8 systemsStark8 systemsWood8 systemsBelmont7 systemsErie7 systemsWashington7 systemsAshtabula6 systemsClermont6 systemsColumbiana6 systemsCuyahoga6 systemsHuron6 systemsJefferson6 systemsLucas6 systemsMiami6 systemsTuscarawas6 systemsAthens5 systemsClark5 systemsFairfield5 systemsLake5 systemsMahoning5 systemsMedina5 systemsOttawa5 systemsPickaway5 systemsPortage5 systemsScioto5 systemsAllen4 systemsAuglaize4 systemsFulton4 systemsGuernsey4 systemsJackson4 systemsLawrence4 systemsMadison4 systemsMuskingum4 systemsPerry4 systemsRichland4 systemsWayne4 systemsBrown3 systemsClinton3 systemsCrawford3 systemsGeauga3 systemsHighland3 systemsKnox3 systemsMercer3 systemsMonroe3 systemsRoss3 systemsSandusky3 systemsAdams2 systemsAshland2 systemsDarke2 systemsDefiance2 systemsDelaware2 systemsFayette2 systemsGallia2 systemsHardin2 systemsMeigs2 systemsNoble2 systemsPike2 systemsPreble2 systemsSeneca2 systemsWilliams2 systemsWyandot2 systemsChampaign1 systemsCoshocton1 systemsHancock1 systemsLogan1 systemsMarion1 systemsShelby1 systemsUnion1 systemsVan Wert1 systems